Nuitka does not see the compiler, what should I do?

Question

Python

Installed Anaconda
Installed mingw64 in it
conda install m2w64-gcc libpython
Installed nuitka

conda install --force-reinstall -c conda-forge nuitka

Trying to compile hello.py :

python -m nuitka --standalone --mingw64 hello.py
Error, mismatch between Python ('x86_64') and C compiler ('None') arches.

Does not see the compiler.
How to indicate?